diff options
Diffstat (limited to 'video.asm')
| -rw-r--r-- | video.asm | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/video.asm b/video.asm new file mode 100644 index 0000000..b47d06c --- /dev/null +++ b/video.asm @@ -0,0 +1,21 @@ + + +video_row: dc.b 0 ; $01 if in row mode - x + ; $00 if in column mode - y +video_increment: dc.b 0 ; $02 if in increment mode + ; $00 if in decrement mode +video_enabled: dc.b 0 ; $20 if screen is blanked +video_6bit: dc.b 0 ; $40 if in 8 bit mode, $00 if in 6 + ; bit mode +video_busy: dc.b 0 ; always 0 + +video_cur_row: dc.b 0 +video_cur_col: dc.b 0 + + EVEN + +video_read: + rts + +video_write: + rts |